Machine for forming split pins.



I. J. YOUNG. MACHINE FOR FORMING SPLIT PINS.

APPLIUATION FILED JUNE 15, 1912.

1,119,211, Patented Dec.1,1914

3 SHEETS-SHEET 1.

I. J. YOUNG. MACHINE FOR FORMING SPLIT PINS. APPLICATION FILED JUNE 15, 1912.

1,119,211. Patented Dec.1,1914

3 SHEETS-SHEET 2 gil"k I. J. YOUNG. MACHINE FOR FORMING SPLIT PINS. APPLICATION FILED JUNI; 15, 1912.

1,119,211, Patented Dec.1,1914.

3 SHEETS-SHIJET 3.

l 'f .59 53 37 y 3(5) UNITED STATES PATENT OFFICE.

IRA J. YOUNG, 0F ST. LOUIS, MISSOURI, ASSIGNOR TO WESTERN WVIRE PRODUCTS COMPANY, 0F ST. LOUIS, MISSOURI,` A.` CORPORATION OF MISSOURI.

MACHINE FOR FORMING SPLIT PINS.

Specication of Letters Patent.

Patented Dec. 1, 1914.

Application filed .Tune 15, 1912.` Serial No. 703,832.

Z 1o all who/nt 'it may concern Be it known that I, IRA J. YOUNG, a citizen of the United States, residing in St. Louis, State of Missouri, have invented certain new and useful Improvements in Machines for Forming Splitl Pins, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates particularly to a machine designed for making split pins or cotter pins, the principal objects of my inven-` tion being to provide a simple, inexpensive machine that can be operated with comparatively little power and which will very rapidly perform in succession the operations necessary to form split pins from wire that is fed into the machine and cut into sections of proper length.

In the manufacture of split pins or cotter pins it is essential that said pins be formed with an eye at the center' and with a pair of parallel legs that are perfectly straight and lie immediately against one another in order that the pins may be readily introduced into the pin holes or openings and to this end I have designed a machine wherein parts of the forming means move simultaneouly with the length of wire of which the pin is formed, thereby avoiding the tendency of the wire to creep while the eye is being formed and the legs are bent together.

A further object of my invention is to combine in a single machine, wire feeding means, wire severing means, and forming means, all of which parts operate in proper time relation with each other, said parts being all operated from a single main driving shaft.

To the above purposes my invention consists in certain novel features of construction and arrangement of parts hereinafter more fully set forth, pointed out in the claims and illustrated in the accompanying drawings in which-d Figure 1 is a front elevation of my improved machine. Fig.` 2 is an elevation of the rear side of the machine. Fig. 3 is a vertical section taken on the line 3--3 of Fig. 1. Fig. 4 is a detail section taken on the line 4,41 of Fig. 1. Fig. 5 is a vertical, section taken on the line 5-5 of Fig. 2. Fig. 6 isa detail sectiontaken on the line GMS of Fig. l. Fig. 7 is a detail section showing a tubular shaft in which the center pin spindle of the forming mechanism is located. Fig. 8 is an enlarged cross-section taken on the line 8-8 of Fig. 7. Fig. 9 is an enlarged detail section of the forward end of the tubular shaft and the center pin suitable bearings in the upper portions of these plates is a transversely disposed shaft il carrying a wheel 5 that performs the function of a flywheel as well as a belt wheel. Arranged on the front side of the plate 2 below the shaft l is a plate 5 and passing there through and through slots 6 in the plate 2 are bolts 7 thereby providing means whereby said plate can be adjusted horizontally. Fixed to and projecting outwardly from the lower portion of the plate 5 is a bracket 8, and positioned thereon is a vertically adjustable plate 9 over which the wire passes as the same is fed to the severing means. Arranged on the plate 5 immediately above this plate 9 is a spring held pawl 10, the point of which is adapted to engage the wire as it passes over said plate 9 thereby preventing reverse movement of said wire. Fixed on the plate 5 in front of the bracket 8 is a block 11 carrying a fixed cutting member 12, the upper end of which is of inverted V shape. Arranged to reciprocate vertically between guides 13 on the upper portion of the plate 5 and immediately over the block 11 is a block 14 carrying on its lower end a cutting member 15, the lower end of which is V shaped in order to coperate with the upper end of the cutting member 12. Projecting outwardly from the block 14 is a trunnion 16 upon which is journaled the lower end of an adjustable pitman 17 and the upper end of this pitman is provided with a strap 18 that passes around an eccentric 19, carried by the forward portion of the shaft 4.

Located on the front side of the plate 2 to the right hand of the plate 5 is a pair of brackets 20` carrying a pair of horizontally disposed rods 21. Arranged to slide upon these rods is a block 22 provided on its lower end with a horizontally disposed plate 23, over which the wire passes as it is fed to the severing means. Mounted on the block 22 is a spring held pawl 24, the point of which engages with the wire to feed the same into the machine. Journaled upon a pin 25a projecting outwardly from the upper portion of the plate 2 is a swinging arm 25, the lower end of which is slotted to receive a pin 2G that is seated in the block 22. Fixed `on the forward end ofthe shaft 4 is a crank arm 27, and adjustably carried thereby is a wrist pin 28 upon which is journaled one end of a lever 29, the opposite end of which is pivotally connected to the lower portion of the arm 25. As the crank arm 27 revolves with the shaft 4, the arm is oscillated thereby moving the bloclr 22 lengthwise upon the` rods 21 and the point of the pawl 24 engages the wireand feeds the same toward the severing mechanism. During the reverse movement of the block 22, the point of the pawl 24 rides over the wire which is held against reverse movement by the pawl 10. Located on the front side ofthefplate 2 and at the right hand end of the machine is a series of rollers 30 arranged in pairs and which serve as means for straightening the wire fed into the machine. Fixed on the plate 2 immediately to the left handside of the block 5 is a block 31 and arranged on the upper portion thereof is a vertically adjustable block 32 provided with a depending lug 33, the underside of which is inclined or beveled. Journaled in a suitable opening formed in the block 31, immediately below the block 32, is a head 34 and formed integral therewith is a tubular shaft 35, the opposite end of which is journaled in the plate 3. vSeated in this head 34 and projecting forwardly therefrom is a pin 36 which is adapted to engage the wire and bend the same around a center pin hereinafter described. Arranged to slide lengthwise through the tubular shaft is a spindle 37, the forward end 38 of which nor-l mally projects forwardly from the head 34 and this projecting forward end'forms the center pin around which the central portion lof the wire is bent to form the eye of the split pin. Passing through the tubular shaft 35 is a set screw 39 -thaftengages on a l flat portion 40 of the spindle 37 thereby causing said spindle to'rotate with the tubular shaftV 35., but permitting Vsaid spindle to move longitudinally relative to said tubular shaft. Fixed on the rear end of the tubular shaft 35 is a pinion 41, and fixed on the rear end of thel spindle 37 isa groov'ed collar 42. Meshing with the pinion 41 -is a gear wheel 43 that is mounted for rotation on a stud 44 projecting fronf thefplate' 3'; Fixed on. the rear end of the sha-ft'l 4Loutside the plate 3 is an yeccentric` 45, and bearing against the edge thereof is the upper portion of an arm 46 that is pivotally connected at its lower end to the plate 3, and pivotally connected to this arm 46 and to the gear wheel 43 is a rod 47 provided with a turn buckle 48. One end of a retractile coil spring 49A is attached to the face of the gear wheel 43 and its opposite end is attached'to the arml 46.y Fulcrumed on a bracket 50 projecting inwardly from the plate 3 is a vertically disposed leverl 51, the upper end of which bears against the face of a cam 54 that is fixed on the main Vdriving shaft 4. The lowerend of this lever 51 is bifurcated and engages the inner end of a rod 52 that is arranged to slide through a bearing in the plate 3 and. the outer end of this rod is provided with a. dependingarm 53, the lower end of which is vbifurcated and engages the grooved collarl 42.

The operation of my improved machine is 4 ras follows: The wire from which the split carrying the feeding, means can be accurately regulated. The wire is thus intermittently fed across the top of the plate 8 between theA cutting members 12 and 15 and the free end ,of said wire extends between the center pin 3.8 and the forming pin 36, as shownin Fig. 11. Immediately after the feeding in movement of the length of wire, the eccentric 19 that is carried by the main driving shaft 4 moves the strap 18 and rod 17 downward, thereby movingthe block 14 downward vand asa result the pointed lower end o'f the cuttingl member 15` is moved downward against the pointed upper end of the fixed` cutting member 12, thereby severing alength of wire. During thisy severing movement and before said wire is completelv severed, rotary` motionuis imparted to the tubular shaft 35 thel engagei'ne'ntV of the gear' 7wheel 43` with the pinion 41 and as a result the forming pin 362 is carried around so as to engage the wire thatis immediately above the center pin 33, andthe portion of the length of wire to the left' of the center pin is bent downward into approximately the position seen in-Fig. 12 at the instant the cuttingA means havecompletely severed .the wire. The gear 'wheel- 43 vis partially rotated the? actionoflthe eccentrie 45,1the high; portion ,of which engagesthe upperv 'portion-of the 46" andfnnioves'the 'samev outwardly into thel position seen inv Eig. 2.

During the rotary motion of the tubular shaft 35, the spindle 37 carrying the center pin 38 rotates with said tubular shaft owing to the engagement of said spindle by the set screw 39, and thus the center pin 38 and torming pin 3G move simultaneously duringthe formation o't' the eye at the center ot the length of Wire and such movement avoids all tendency ot' the wire to creep, and for this reason the logs of the pin are formed equal in length. The forming pin 38 passes around until it occupies a position immediately beneath the 'forming lug 33 and the inal movement ot said forming pin presses the legs of the pin directly against the inclined underside 01E the rigid forming lug 33, thereby cansing said legs to lie parallel with each other and bear directly against one another, which is a particularly desirable result in the :formation oit split pins. At this point in the operation the upper portion ot the arm flG rides onto the lower portion of the eccentric 45 and the re tractile coil spring QD, which was heretofore expanded, now acts to bring about reverse rotary movement ot the gear wheel 43, thereby reversely rotating the pinion il and as a result the tubular shaft 35 and spindle 37 are likewise reversely rotated. `When these parts have been partially rotated in reverse direction and brought to approximately the i position seen in Fig. 14. the upper end of the lever 51 rides onto the l'iigh portion oiB the cam tace of the disk fl, thereby sw1ng- Ving said `leyer on its tulcrum. This movement imparts sliding movement to the rod 52 and the arm 53 carried by said rod enga ging the grooi'ed collar l2 moves the spindle lengthwise through the tubular shaft 35, thereby witl'idrawing the center pin 38 from the eye in the center of the split pin and the latter is free to discharge into a suitable receptacle.

By my improved construction the completed pin is formed by a single arcuate movement of the forming pin 3G, and the forming oit the eye in the center of the length oit wire is accomplished without extraneous means tor holding the wire. The end of the legs of the pin immediately adja cent to the eye bears directly against the fixed Jforming lug 33 while the forming pin 3G engages the central portion of the length of Wire and bends the same around the center pin. The head 3ft carrying the forming pin 36 is partially rotated during the for mation of the eye at the center' of the pin, and prior to the completion of the partial rotary movement of the parts 36 and 38. the length oil `wire is cut between the members 12 and 15. Immediately thereafter, the center pin 38 is withdrawn thereby releasing the completed pin and permitting the same to discharge from the forming means. The forming pin 36 in operation engages the wire and bends the same around the center pin and at the end oli the arcuate movement ot said 'for ming pin, the legs ot the split pin are `lorced into contact with each. other. At this point the 'forming pin exerts pressure upon tho fixed :tol-ming lug 33 through the sides or legs of the split pin, and such pressure forms the reverse bends between the legs oit the pin and the eye. rThus it is absolutciy necessary that the length oi' wire which forms the split pin be cut from the main body of the wire be'ore the forming pin exerts pressure upon the lixed :forming member through the parts or legs of the 'wire forming the neck .in'nnediately adjacent to the eye. ln this manner a split pin is toi-ined which has legs et equal length which (it snugly against one another, and said legs being united at one end by a substantially round eye. '.lhis torni ol split pin is especially desirable tor use in various .mechanical constructions, ior the reason that the parallel close fitting legs can be easily inserted in an aperture of proper size. The fixed lug 33 lis an essential part ol the 'forming mechanism, i'or the reason that it supports the length of wire while same is being formed into the split pin, and the inclined or beveled 'tace o'l said fixed torming lug opposes the pressure olli the forming pin 3G `when the legs oli the splitl pin are Aforced into contact with each other. lVhile the 'forming pin is exerting pressure upon one otl the legs ot the split pin, the tace ot the lug 3S-i is bearing against the opposite leg at the point where the same unites with the eye of the split piu. thus forming the neck portions or reverse bends between the eye and logs.

One oit the principal tentures ot my invention is the mounting of the spindle 37 within the hollow shaft 35 so that when said hollow shaft is positively rotated, first in one direction and then in a reverse direction by the engagement of the gear wheel 4.3 with the pinion lll, it necessarily follows that the spindle and center pin will likewise be positively rotated in both directions synchronously with the hollow shaft, and at the proper time the lever 51 is actuated to move the spindle and center pin lengthwise with respect to the hollow shaft and the parts carried thereby.

The various parts ot my improved machine are ot such relative sizes and are so timed in operation as to completely form one of the split pins with each complete revolution of the shaft 4, that is, the proper length ol wire is fed forward by the block 22 and pawl 24, the cutting mechanism is actuated and the forming means is actuated to form a complete split pin -from the sei'- ered length of wire and the split pin is released during one complete revolution ot the shaft.

rlhe various parts of the machine are arranged and connected so as to operate in proper sequence with great rapidity and thus a large number ot' split pins can be turned out within a comparatively short space of time, thereby materially reducing the cost of producing split pins for the market.

It will be readily understood that minor changes in the size, form and construction of the various parts of my improved machine can be made and substituted for those herein shown and described Without departing from the spirit of my invention, the scope of `which `is set forth in the appended claims.

l claim:

l. ln a machine of the class described, the combination with Wire-feeding means, a portion of which is adjustable for regulating the length of Wire fed by said means, of Wire-severing means Which is adjustable so as to vary. the position of the point Where the Wire is severed, and rotary forming means adapted to engage-the severed portion of the Wire and form the same into a split pin, a portion or' which forming means is movable to release the split pin When the same is completely formed.

ln a machine of the class described, the combination with a main driving shaft', of adjustable -Wire-feeding means, adjustable Wire-severing means, rotary forming means adapted to engage the severed section of Wire and .form the same into a split pin havinga centrally located eye and a pair of straight legs of equal length, a portion of Which forming means `is movable to release the split pin when the same is completely formed, and connections between the main driving shaft, feeding means, severing Copies of this patent may be obtained for five cents each, by addressing the Washington, D.' U.

means and forming means whereby the latter are actuated in proper sequence to produce the completed split pin.

3. ln a machine for forming split pins, each having a centrally arranged eye and a pair of straight legs of equal length, the combination With a split pin forming means comprising a head having a projection, a center pin normally projecting beyond the face oi'f the head and connected therewith so as to .rotate in both directions With said head, means for rotating the head, means for withdrawing the center pin, Wire-iceding means, Wire-severing means, and means whereby the forming mechanism, the Wire .feeding means and the cutting mechanism are operated in proper time relation and at regular intervals relative to each other.

ln a machine of the class described, a

split pin forming mechanism comprising av rotatably mounted center pin, a movable member for bending the Wire around said center pin to form the eye of said pm, Which center pin and member are connected so as to rotate positively with each other and a fixed forming member arranged in oppo* sition to the movable member against which the legs of the pin are engaged, means for withdrawing vthecenter pin from the eye of the split pin after lthe same is formed, and means for imparting partial rotary movement to the center pin and movable member first in one direction and then in the opposite direction.

In testimony whereof I hereunto .aiix my signature in the presence of tivo Witnesses this 8th day of J une, 1912. j,

v IRA J. YOUNG.

Witnesses:

` RUTH HENRY,

C. K. HALEY.

Gommissioner of Eatents, 

